Explanation

Thermal cracking is a process in which high temperatures are used to break down large hydrocarbon molecules into smaller, more useful molecules.

Such as gasoline and diesel.

This process is widely used in the petroleum industry.

Explanation

The volume of an atom is typically calculated using the atomic radius and the formula for the volume of a sphere (V = (4/3)πr³), where r is the atomic radius.

The atomic radius is the distance from the nucleus to the outermost electron orbital.

Explanation

Germanium is a semiconductor.

It commonly used in electronics for its ability to conduct electricity under certain conditions.

It has properties between those of a conductor and an insulator, similar to silicon.

Explanation

The value of absolute zero is -273°C.

It is the theoretical temperature where all molecular motion stops.

It is equivalent to 0 Kelvin in the Kelvin temperature scale.

Explanation

Coulomb's law deals with the force between electric charges, not the relationship between volume and pressure of a gas.

The inverse relationship between volume and pressure is explained by Boyle's Law, not Coulomb’s law.

Explanation

The density of water is maximum at 4°C, not 5°C.

At 4°C, water reaches its highest density before expanding when cooled further into ice.

Explanation

Water freezes and melts at 0°C (32°F) under standard atmospheric pressure.

At this temperature, water can exist in both solid (ice) and liquid forms depending on whether heat is being added or removed.

Explanation

Electrons are lost in an oxidation reaction.

Oxidation simply means a gain of oxygen and an oxidizing agent is a substance that oxidizes something.

The reduction is the gain of electrons

Explanation

Sublimation is the process in which water vapour directly condenses into solid form.

Condensation is the process of transformation of water vapour into water.

Evaporation is process by which water or a liquid is transformed from liquid to gaseous state.

Precipitation is the condensation of water vapor in air in form of water droplets or ice.

Explanation

Plastic is primarily made from petrochemicals, including oil and natural gas.

They are processed to create synthetic polymers used in manufacturing.